Guys,
During leveling adjustment of one motor we found difficulty to obtain acceptable motor’s soft foot(less than 0.05mm)we are getting 0.2mm soft foot due to in flat base support. The contractor/Vendor recommended Welding of pads(5-6mm thickness) to base for soft foot correction(see attached...
Guys,
We have new machine motor 8 MW motor ,for motor to gearbox alignment the vendor has put shims around 8 to 9 shims ubder motor feet which is more than API recommended 5 shims.
We recommend vendor to arrange thick shims so as to reduce the no. Of shims upto 5. But vendor rejected our...
Guys,
We have new machine(reciprocating compressor 04 vertical cylinders), we have checked piston rod run outs and found values ranging from 0.18mm to 0.3mm. Vendor does not have any problem with this value but these values looks high to me.I was searching in API 618 , not found enough...
Guys,
We have VSD motor driven Lobe type blower.Due to nature of process, this blower can see large and quick swings in the speed output. Its also a fairly large motor(1000 HP) and being a lobe type there’s quite some mass on the coupling end.Does these quick speed changes creates any risk for...
Guys,
We have observed taperness in a motor feet (due to poor machining) which is causing soft foot.Someone has suggested to make taper shims and put under motor feet to keep them in one leve.
Is it recommended to put tapered shim under motor feet to align it with pump.If taper shimming is...
Guys,
While connecting the discharge and suction piping to the cylinders of reciprocating compressors,Which is right location to put dial indicator to see the strain coming from piping to the compressor? Some one told me to put dial indicator on the crank shaft coupling hub to see the piping...
Guys,
We have new centrifugal pump commissioning next week , we are going to do water run test for 4 hours. It has double seal with Plan 53B (Seal barrier fluid Therminol 66).Therminol 66 is not available with construction contractor so the contractor recommended to use demin water as barrier...
Hi Guys, we have referigeration screw compressor getting tripped on low oil pressure during startup.Its new installation , vendor is searching for the reasons for this.We have done some troubleshooting checked the oil injections lines to the rotors ,calibration oil control valves,strainers,pump...
Guys , How to check run out for an Agitator shaft with steady bearing,the shaft diameter is 75mm and length 11meters,The vendor recommends to check run out on extension shaft at the end.It is supported at one end only(at the top) and other end free so when try to manually turn the shaft for run...
Guys,
For new installation we faced issue The contractor has put shim under pump base plate so Is it acceptable to use shims under base plate. I have checked in API 610 & 686 but no information available whether shims under base plate is allowed OR not.
Guys , If please share if know any...
For new lube oil pump ,We have faced issue of not able to achieve the required DBSE. The deviation between the design and actual DBSE is 3mm.The motor bolts are bolt bound and there is no margin available to shift motor to achieve the required DBSE.I know there is one way which to enlarge bolt...
Guys,
In our plant during startup ,one of Cooling tower circulation pump created abnormal sound,it ran for 5 seconds only and after stop, The Pump was found Shifted on its base around 3mm towards discharge side.We try to turn the shaft but it was jammed ,after dismantling ,both case wear ring...
